London, England (Sports Network) - The Vikings will be without two of their starting defensive backs this Sunday when they face the Pittsburgh Steelers at Wembley Stadium in London, England, as cornerback Chris Cook and safety Jamarca Sanford have been ruled out.
Cook (groin) has recorded eight tackles, while Sanford (hamstring) has 17 tackles for the Vikings in three games for Minnesota this season.
Also ruled out for Sunday's game is backup tight end Rhett Ellison (knee).
Starting middle linebacker Erin Henderson (heel) has been listed as probable for the Vikings on Sunday. Also listed as probable for the Vikings is running back Matt Asiata (hamstring), cornerback A.J. Jefferson (ankle), long snapper Cullen Loeffler (neck), and defensive tackle Kevin Williams (knee).